There is no identity crisis- it's just that the identities have changed. Epcot isn't edutainmentland anymore (hasn't been for a while) and won't be again. Hollywood Studios isn't about movie making anymore. Animal Kingdom isn't just about animals anymore. All of these changed a LONG time ago.
I think the issue is less that these parks are moving away from their original identities, and more that their current identities are kind of piecemeal. Yes, DHS isn't a functioning studio anymore, and it isn't about a behind-the-scenes look at movies, so...what
is it? With all the upcoming changes to DHS (MMRR, TSL, SW:GE, and hopefully a name change) I think DHS's theme will seem more coherent soon, but right now...I think it's fair to say there's a bit of an identity crisis, as DHS is in this tricky transitional period between studio park and a more general movie-themed park.
I think DHS at least has clearer direction than Future World in Epcot...The issue here (at least for me) isn't just that Epcot is moving away from edutainment, it's that there's a lack of attractions in general, with whole areas like Innoventions essentially left to rot. We know GotG is coming, but that still leaves attractions like Figment, the Pixar Short Film Festival (if that can even be considered an attraction) and Innoventions as big question marks. And even if these attractions are upgraded or replaced in the next few years (I'm sure they will be), what will these rides all have in common with each other? What will the uniting theme be? Because "Not really edutainment anymore" isn't a theme in itself...especially when rides like Spaceship Earth and Living with the Land
are still edutainment-based attractions.
I don't think DAK belongs in this discussion at all though, TBH. Dino-rama is a problem area and the appropriateness of Pandora has been debated back and forth (I think it's fine) but DAK probably has the clearest and most consistent theme across the four parks. It can definitely use some new attractions and experiences, but it doesn't need the total theme overhaul that DHS and Epcot do.